/*
 * Copyright 2014-2019 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.netflix.spectator.impl;

/**
 * Base for {@link StepLong} and {@link StepDouble}.
 */
public interface StepValue {

  /** Get the value for the last completed interval as a rate per second. */
  double pollAsRate();

  /** Get the value for the last completed interval as a rate per second. */
  double pollAsRate(long now);

  /** Get the timestamp for the end of the last completed interval. */
  long timestamp();
}
